You can fill the request form to add your coin at coinmarketcap, but please make sure first that your coin suits with the requirements to be added at coinmarketcap. Otherwise you will just wasting time in filling the form, open the faq page for full requirements.

Let me make it easier for you:
FAQ: https://coinmarketcap.com/faq/
Request Form: https://docs.google.com/forms/d/e/1FAIpQLSeqpM6DVuxNRJ43oD90fCsm8UltR9oIiFaVxxqt3ch_eJ5Dlw/viewform